Oil burner



Feb. 21, 1928. 1,660,075

. A. P. HOLDEN ET AL OIL BURNER Filed March 19. 19 26 s Sheets-Sheet l l? 1 612 f 013. mu QM Feb. 21, 1928.

A. P. HOLDEN ET AL OIL BURNER 3 Sheets-Sheet 2 Filed March 19. 1926 Feb. 21, 1928.

1,660,075 A. P. HOLDEN ET AL OIL BURNER Filed March 19. 1926 3 Sheets-Sheet 5 [Hz/anions.

MZPM

Fatented Feb. 21, 12280 ARTHUR, P. HOLDEN AND PHILIP MORGAN, 0E TORONTO, ONTARIO, CANADA.

OIL BURNER.

Application filed March 19, 1926. Serial No. 965075.

The principal objects of the invention are, to eiiect' the thorough atomization of the oil by preheating both the air and oil before they are brought into contact at the mixing nozzle, and to eiiectively prevent the clogging of the discharge passage.

A further object is to provide a burner structure which may be very easily and quickly adjusted.

The principal features of the invention consist in the provision of a heating Chamber connected with the oil atomizing nozzle whereby the air for atomizing the oil is heated prior to its being directed'into the nozzle and in bafliing the flow of air through said heat chamber to intercept and separate therefrom any particles of dirt, and further to provide means for adjusting the position of the burner and the ignition terminals.

Tn the drawings, Figure 1 is a plan view of the preferred form of burner structure.

Figure 2 is a vertical longitudinal section through the line 2-2 of Figure 1.

Figure 3 is an end elevational and part elevational section on the line 3-3 of Fig ure 2.

Figure 4c is a perspective view of a moditied form of structure. 1

Figure 5 is an end elevational view of the structure shown in Figure Q, the outside bafie being removed.

Figure 6 is a longitudinal part mid-sectional view on a reduced scale of the structure illustrated in Figures 4 and 5.

Figure 7 is a plan view of a structure simi= lar to Figure 6 showing the arrangement for a gas pilot light.

Figure 8 is a front end view of the structture illustrated in Figure 6.

In the structure illustrated in Figures 1 2 and 3 the body 1 is cast with a substantial- 1y elliptical-cross section having the inner wall 2 spaced from the outer wall and term in an air chamber 3 through which a tubular passage 4 extends.

. The upper side of the body .1 is preferably formed with a longitudinal ridge 5 of a semi-tubular form, at the forward end of which is arranged circular opening 6 in which rotatably mounted t 1e nozzle member 7.

The nozzle 7 is jection 3 rotatable in e and a collar 9 abuttin t with a sleeve procular opening 6 end and a pasfrom the open th e g ne 16 extends forwardly sleeve 8 to the inner side of the discharge end 11. I

A tubular nozzle end 12 is secured in the discharge end 11. r

The nozzle end"? above the passage 10 is formed with a threaded hole 13 in central alignment with the sleeve 8 which leads to the oil discharge tube 14 which is threaded into the outward end and which extends centrally through the nozzle end 12.

The inner end of the nozzle 7 is threaded to receive the end of a pipe 15 which encircles the oil tube 16, the pipe 15 being rotatably supported in the opening 17.

The oil tube 16 is supported at the outward end of the pipe 15 in abushing 18.

A collar 19 is keyed on to the outer end of the air pipe 15, being secured by a look nut 20 and is provided with a lug 21 which extends upwardly therefrom.

A pair of lugs 22 are secured to the body 1 and extend either side of the lug 21 and support the adjusting screws 23 which are operated to rotate the pipe 15 to adjust the lateral direction of discharge of the nozzle.

The pipe 15 is provided with perforations 24 which allow air to flow into the pipe from the interior of the airchamber 3. Air is diblower.

The air circulated through the oval casing absorbs heat therefrom as said casing is arranged to extend into the fire-box of a furnace and the air thus heated flowing to the top enters the pipe 15 through the perforations 24: therein and then flows out through the nozzle atomizing the oil flowing through the pipe to the oil discharge pipe 14. v The tubular passage 4: through the member 1 is adapted to receive a suitable ignition device which is here shown in the form of a pair of electrical terminals 26 having their spark ends projecting below the nozzle 7 so that the atomized oil from the end of the nozzle will extend into the zone of an electric spark flowing between the terminals.

The terminals are supported in insulating sleeves 27 and the inner ends are secured to the insulating block 28 arranged withina the terminals 26 are connected by means of short electrical connections 32 to the terminals of the transformer.

The transformer produces a suitable high tension current to form a jump spark.

This construction is very compact and the arrangement of the casing 29 on the guides 30 enables the very rapid adjustment of the terminals in their relative positions in respect to the nozzle.

In the form of the device illustrated in Figures 4, 5 and 6 a casing 33 of substantially rectangular form is adjustably arranged within a supporting sleeve 34, preferably secured in the fire-door of the furnace.

The casing is formed with an offset inner endhaving an opening 35 through which the ignition terminals 36 extend and another opening 37 is arranged in the antler portion of the offset through which the atomized oil is projected.

Within the casing 33 is supported an inner casing 38 having an air tube connection 39 leading thereto to which air is fed from a suitable blower.

The forward end of the'casing 38 is provided with a bafiiei wall 40 againstwhich the air blown into the casing impinges and any particles of dirt which may be picked up from any portion of the apparatus will be arrested and prevented from clogging the burner nozzle.

The air flows over the baffle 40 both sides of the central portion 41 in which the oil tube 42 of the nozzle is secured.

The top of the casing 38 is formed with a longitudinal groove 43 through which the oil feed tube 44 extends.

The casing 38 is pivotally supported at the forward end on a'stud projection 45 extending through an opening in the casing 33 and at the rear. end thecasing is pivotal'ly supported in the yoke 46 which extends downwardly from the cross bar 47 forming part of the outer casing 43.

The yoke 46 is provided with a pair of lugs 48 in which are threaded the set screws 49 which engage the lugs 50 extending laterally from the hexagon end 51 of the easing 38.

By adjusting the screw 49 the casing may be tilted so as to'direct the atomized spray to the desired point.

The ignition terminals 36 which are supported from a casing 52 are adjust-ably secured to an extension 53 of the casing 33.

In the structure illustrated in Figure 7 a gas pilot ignition 54 is shown in the lower part of the casing 33.

It will be understood from this description that the burner structure described is supported to project into the fire-box and it istherefore surrounded with an intense heat, consequently the air directed in to the heating chamber thus provided before reaching the nozzle is raised to a high temperature and is thoroughly dried so that when it flows past the oil discharge pipe, it will have the maximum absorption conditions to effectively atomize the oil.

It must be understood also that the air is fed to the atomizing nozzle under pressure and the oil is fed through the atomizing nozzle in a measured flow, consequently the mixture of air and oil can be accurately regulated and the very bestcombustion re sults will thus be achieved in preheating a regulated supply of air. i

It is a very important feature of this invention and of the constructions described that the air being directed to the burner nozzle is prevented from carrying particles of dirt, grit, etc. that may be picked up in the pipes orin castings and which might clog the nozzle.

It is also important to the successful operation of the burner that the nozzle can be adjusted to direct the spray of atomized oil in a definite direction in order that the best results in the combustion within the fire-box may be achieved and incidental to this adjustment it is important that the ignition terminals be capable of adjustment to suit the conditions that may be experienced in a setting up of the device in difierent furnaces.

What we claim as our invention is 1. In an oil burner, the combination with a fire-box, of a casing extending into the fire-box, means for directing a flow of air to said casing, a nozzle adjustably carried by said casing within the fire-box and connectcd with the interior of the casing, means for directing air and oil to said nozzle, and means mounted on said casing exterior to the fire-box for adjusting the angular set of said nozzle from outside the fire-box relative to said casing.

2. In an oil burner, the combination with a fire-box, of a casing extending into the fire-box, means for directing a flow of air to said casing, an atomizing nozzle connected with the air chamber in said casing, means for directing air to said nozzle, a pair of set screws mounted in rigid supports, and means connected with the nozzle having a lug extension engaged by said set screws and adapted to govern the angular set of the nozzle.

3. In an oil burner, a casing adapted to extend into a fire-box, a nozzle memberrotatably mounted at the inner end of said casing, a perforated air pipe connected with said nozzle and receiving air through the perforations from the interior of the casing to direct same through the nozzle, an oil pipe leading through said air pipe and having a discharge leading from the nozzle, and means for rotatably adjusting said air pipe in the casing to effect the adjustment of the nozzle.

4. An oil burner, comprising a casing having a tubular passage therethrough, a burner nozzle connected with the air chamber surrounding said passage, means for feeding air through said air chamber to said nozzle,

means for feeding oil to said nozzle, a terminal block mounted for adjustment longitudinally of said tubular passage and ignition terminals rigidly mounted on said terminal block and extending through said tubular passage.

5. An oil burner, comprising a casing having an open tubular passage therethrough, a burner nozzle connected with the air chamber surrounding said passage, means for feeding air through said air chamber to said nozzle, means for feeding oil to said nozzle, an extension on said casing beyond the outward end of said open tubular passage slots in said extension in longitudinal relation to said open tubular passage, a terminal block mounted on said extension and having screws extending through said slots and locking said block in set positions and ignition terminals mounted on said terminal block and extending through said open tubular passage.

6. An oil burner, comprising a casing, a

tubular passage open to atmosphere at either end and extending through said casing having its walls encased thereby, a burner nozzle arranged to project oil and air across the inner open end of said tubular passage and being connected with and receiving air from the interior of said casing, means for feeding air to the interior of said casin around said open tubular passage, means for feeding oil'to said nozzle, and means extending through said open'tubular passage from the outer open end thereof into the path of the projected oil and air for igniting the same.

7. An oil burner, comprising a casing adapted to extend into a fire box, oil and air directing nozzles mounted on the inner end of said casing, an oil supply tube leading through the interior of said casing and connected with the oil directing nozzle, a perforated air conduit encircling said oil supply tube within the casing and connected with said air directing nozzle and receiving air from the interior of said casing through the perforations, and an air inlet to said casing outside of the fire-box.

ARTHUR P. HQLDEN. PHILIP MORGAN. 

